On 19.10.2011 00:43, Lukas Koster wrote:
> Jakob is right when he says we don't have Expressions in our catalogues.
> Nor do we have Works. We only have Manifestations (=bibliographic
> records) and Items (holdings/items). Works and Expressions are implicit
> and repeated. It is virtually impossible to add these FRBR entities to
> existing systems, also with RDA.
I am not sure whether we actually describe Expressions, but there seems
to be consensus on this list that most library catalog records are about
frbr:Manifestations and frbr:Item. So I started with converting library
records to frbr:Manifestation and frbr:Item in RDF and try to link these
entities to other resources (organizations, places, works etc.).
Actually there are URIs for works, for instance:
http://www.librarything.com/work/3032251http://dbpedia.org/resource/The_Diary_of_a_Young_Girlhttp://dbpedia.org/resource/The_Diary_of_Anne_Frank_%281959_film%29http://dbpedia.org/resource/The_Diary_of_Anne_Frank_%281980_film%29http://dbpedia.org/resource/The_Diary_of_Anne_Frank_%28TV_serial%29http://dbpedia.org/resource/The_Diary_of_Anne_Frank_%28opera%29http://dbpedia.org/resource/The_Diary_of_Anne_Frank_%28play%29
Maybe some of this URIs better refer to frbr:Expressions, but I do not
really understand frbr:Expressions.
> Karen is right when saying that library linked data is about holdings
> information (unique data) that should be linked to web based
> bibliographic metadata. This means we also need to replace existing
> introverted catalogue systems with new extroverted systems.
I am just about to create URIs for frbr:Items for more then 400
libraries (branches not counted) and 80 million items, for instance the
following URIs refers to an exemplar of the diary of Anne Frank as book
an to one exemplar of the 1959 film:
http://uri.gbv.de/item/opac-de-hil2:epn:032163339http://uri.gbv.de/item/opac-de-hil2:epn:645178810
Until now DAIA classes and properties seem to fit for the
library-related parts. I even removed some proposed DAIA classes in
favour of already existing classes. The core classes are illustrated in
this diagram:
http://www.gbv.de/wikis/cls/DAIA#DAIA_model_as_graph
The reason why I do not fully stick to FRBR with DAIA (I prefer
bibo:Document from the Bibliographic ontology, which is more or less
equivalent to foaf:Document) is the common use case of DAIA. I bet that
people often want to know about the availability of some document
without telling you, or even without knowing, whether they refer to a
work or to an expression or to a manifestation. And they are right.
Unfortunately there is no connection between FRBR and this kind of
normal documents. I would map it the following way:
bibo:Document = frbr:Endeavour - frbr:Item
This implies that frbr:Work, frbr:Expression, and frbr:Manifestation
or subclasses of bibo:Document. We can discuss about not including
frbr:Work, but some explicit connection is needed.
Jakob
--
Jakob Voâ <jakob.voss@gbv.de>, skype: nichtich
Verbundzentrale des GBV (VZG) / Common Library Network
Platz der Goettinger Sieben 1, 37073 GÃ·ttingen, Germany
+49 (0)551 39-10242, http://www.gbv.de